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regmap: Add a config option for hwspinlock

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Unlike other lock types hwspinlocks are optional and can be built
modular so we can't use them unconditionally in regmap so add a config
option that drivers that want to use hwspinlocks with regmap can select
which will ensure that hwspinlock is built in.

Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2017-11-03 12:38:04 +01:00
parent 8698b93647
commit f25637a6b8
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GPG key ID: 24D68B725D5487D0
2 changed files with 11 additions and 0 deletions
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4
drivers/base/regmap/Kconfig
View file

@ -5,6 +5,7 @@
config REGMAP
default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ)
select IRQ_DOMAIN if REGMAP_IRQ
select HWSPINLOCK if REGMAP_HWSPINLOCK
bool
config REGCACHE_COMPRESSED
@ -36,3 +37,6 @@ config REGMAP_MMIO
config REGMAP_IRQ
bool
config REGMAP_HWSPINLOCK
bool

7
drivers/base/regmap/regmap.c
View file

@ -414,6 +414,7 @@ static unsigned int regmap_parse_64_native(const void *buf)
}
#endif
#ifdef REGMAP_HWSPINLOCK
static void regmap_lock_hwlock(void *__map)
{
struct regmap *map = __map;
@ -456,6 +457,7 @@ static void regmap_unlock_hwlock_irqrestore(void *__map)
hwspin_unlock_irqrestore(map->hwlock, &map->spinlock_flags);
}
#endif
static void regmap_lock_mutex(void *__map)
{
@ -672,6 +674,7 @@ struct regmap *__regmap_init(struct device *dev,
map->unlock = config->unlock;
map->lock_arg = config->lock_arg;
} else if (config->hwlock_id) {
#ifdef REGMAP_HWSPINLOCK
map->hwlock = hwspin_lock_request_specific(config->hwlock_id);
if (!map->hwlock) {
ret = -ENXIO;
@ -694,6 +697,10 @@ struct regmap *__regmap_init(struct device *dev,
}
map->lock_arg = map;
#else
ret = -EINVAL;
goto err;
#endif
} else {
if ((bus && bus->fast_io) ||
config->fast_io) {